Razercfg is a Razer device configuration tool. It is based on "razerd", a background daemon doing all of the low-level privileged hardware accesses. The user interface tools are "razercfg", a command-line tool, and "qrazercfg", a Qt-based graphical device configuration tool. Supported devices are the Razer DeathAdder (Classic, 3500DPI, and Black Edition) mouse, the Razer Krait mouse, the Razer Lachesis mouse, the Razer Copperhead mouse, the Razer Naga mouse, the Razer Boomslang CE mouse and the Razer Taipan mouse.
filter_evdev creates a virtual input device from a physical input device. It provides anytime configuration of positive, negative, or custom acceleration or sensitivity for each axis, or remapping axes or buttons as requested, e.g. inverting the two main mouse buttons or making the middle button act as the right button. Configuration can be dynamically changed by text commands sent to a UNIX socket. Commands apply to specific axes, buttons, or keys when moved in specified value ranges, and consist of custom arithmetic operations.